How to model this Shape?
Here is a try, I've followed the profile shape, switch view, add some vertical edges, mirror, begin to draw all the holes with additional edges, extrude one time to give thickness, extrude a second time to dig the holes, put some additional edge loops to sharp the angles. At the end I've added the circle drawing with the help of the knife or knife project tools, but I could have created it earlier (on the basic plane, before the first extrude).